(19)

(11)

EP 2 170 767 A1

(12)

(43) Date of publication: 07.04.2010 Bulletin 2010/14 (21) Application number: 08772497.7 (22) Date of filing: 10.07.2008

(51) International Patent Classification (IPC):  C01B 25/36(2006.01) (86) International application number: PCT/US2008/069584 (87) International publication number: WO 2009/009629 (15.01.2009 Gazette 2009/03)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 10.07.2007 US 958958 P 09.07.2008 US 169665 (71) Applicant: Wyeth LLC Madison, NJ 07940 (US)	(72) Inventors: KHANDKE, Lakshmi Nanuet, NY 10954 (US) PEREZ, Joseph Nanuet, NY 10954 (US) (74) Representative: Talbott, Dawn Jacqueline et al Wyeth Laboratories Patent Department Huntercombe Lane South Taplow Maidenhead Berkshire SL6 0PH Taplow Maidenhead Berkshire SL6 0PH (GB)